The sum of two numbers is 54 and the difference is 18 . what are the numbers

Here is my question! jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate. true or false?

Can someone me with my math problem pls my teacher is on my back about this

Tatiana reads 40 pages of her book every night for x number of nights. write an expression that shows the number of pages she has read